I would like to have my opengl canvas be continuously draw over without erasing so that I can have a complex background with newly added elements.
However, I've just found that I cannot draw on the portion of the screen where I have already draw before. In a result, I cannot add my new colors over my old color.
I have tried to use rendering context feedback to redraw my background but there is some slight displacement among frames and make it result in a small bluring effect...
I guess the problem is because the default rendering in Max/Jitter is double-buffering and my idea in the first should work if I can have a single-buffered canvas, is it?
Thanks for your attention and look forward to hear any advise...